Japanese Industrial Standard - JIS B2311-82.

The standard specifies steel butt-welding pipe fittings which are generally used for ordinary piping in JIS G3452, for steam, water, oil, gas, etc., at relatively low pressures.

Materials : The fittings to this standard are made from materials in accordance with JIS G3452.

Pressure Ratings : The fittings are free from leakage at hydrostatic pressure up to a maximum of 2.5 MPa.

Welding End Preparations : Bevel dimensions and tolerances conform to those shown in the diagram. Fittings with a basic thickness below 4 mm have plain unbeveled ends.

 Details of Buttweld Fittings to JIS B2311-82 (SGP  - All Sizes are Welded)

(Click thumbnail to enlarge)

		90o ELBOWS LONG RADIUS
		90o ELBOWS SHORT RADIUS
		45o ELBOWS LONG RADIUS
		WELDING REDUCERS CONCENTRIC AND ECCENTRIC
		TEES EQUAL AND UNEQUAL
		WELDING CAPS